Malicious PDF — malware analysis report

Static analysis result for SHA-256 452aac1210c7b082…

MALICIOUS

PDF

39.1 KB Created: 2020-11-07 11:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6d8d8eb6d7fb3e0ce5bb2810a7e6f6c6 SHA-1: 6fda9231a69e19e7753a09004abe40644963f844 SHA-256: 452aac1210c7b0820c55dd32ef446153c5a3fe8ffccd2cc9943809ca4cb168e5
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/aws?keyword=upstar+tv+32 PDF link annotation
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/5229935.pdfIn PDF document text
    • https://wikamarelifegef.weebly.com/uploads/1/3/4/3/134380256/xoserikekoviro.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/tipenubaritisak.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/kifurilaxajap_vazuzoforir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_5fa60cfda3755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_5f9935b9e7b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f8ad3f604ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5f973da15de62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://kogoxomo.files.wordpress.com/2020/11/lalovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfd76b5-c758-4ddf-a5d2-0272e44ab086/coi3_compound_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf504bb8-f24c-4215-bf9b-564907123d35/slitherio_unblocked_google_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc35e3a-2a6a-427a-aae8-0d38f37b5e65/luzujota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431a796f-de52-44ae-8fe8-fb0313de4d14/dezojobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed214482-65ef-4e02-ad30-47dd2884ea37/gorezajoluwuxob.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1C 4532 bytes
SHA-256: 99f1839d9794ee7d05470d5ed9cda16e7e56568da2e7e6607e7feae65e781ad2
font_01_sfnt_off00005e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 10332 bytes
SHA-256: 1d23c836af93b8f6090db53bdcabb735ad6aee62d5e803373adb8dc68cb3bbae
font_02_sfnt_off000081e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.